Follow @Openwall on Twitter for new release announcements and other news
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Fri, 24 Apr 2015 00:48:57 +0200
From: Harald Becker <>
CC: Rich Felker <>
Subject: Re: Still not possible to send mail to domain

On 24.04.2015 00:33, Rich Felker wrote:
> On Thu, Apr 23, 2015 at 11:55:30PM +0200, Harald Becker wrote:
>> Hi Rich,
>> extending my search on qhe net I found the following:
>> All of the senders experiencing the bounced messages mentioning
>> cname lookup failure appear to be running the qmail mail server
>> software.
> Again there are no CNAMEs involved.

I think several authors use the term CNAME when they see a name return 
like brightrain, which is not the sense of DNS CNAME :(

>> Qmail, if not using a third party patch that was written in the late
>> 90’s, has an issue sending to domains whose name servers respond to
>> DNS queries of type “ANY” with more than 512 bytes of data; that is
>> a bug in qmail and the author has never fixed it because he wants
>> you to use his DNS server software which also eliminates the issue
>> in a different way.
> Responses larger than 512 bytes are not supported over UDP and are
> rarely used. I saw some replies close to that long but none of them
> had the TC (truncation) bit set, so I don't think that's your issue
> either.

So what did you change, as it now works?


Powered by blists - more mailing lists

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.